Table 6.

Multiple linear regression analysis of the association between hair toxic metal levels (dependent variables) and BMI and CHD status (independent variables) after adjustment for age and sex of the examinees.

Metal	Al		As		Cd		Hg		Ni		Pb
Predictor	β	p	β	p	β	p	β	p	β	p	β	p
BMI	0.133	<0.001 *	0.058	0.076	0.034	0.034	0.063	0.097	−0.003	0.927	0.142	<0.001 *
CHD	0.382	<0.001 *	0.440	<0.001 *	0.259	0.259	0.024	0.586	0.060	0.186	0.098	0.021*
Sex	0.085	0.017 *	0.295	<0.001 *	0.201	0.201	0.169	<0.001 *	0.147	<0.001 *	0.307	<0.001 *
Age	−0.093	0.026 *	0.003	0.933	0.113	0.113	−0.147	0.001*	−0.069	0.124	−0.031	0.455
Multiple R	0.396		0.564		0.406		0.225		0.165		0.359
Multiple R2	0.157		0.318		0.165		0.051		0.027		0.129
Adjusted R2	0.152		0.314		0.160		0.045		0.021		0.124
P model	<0.001 *		<0.001 *		<0.001 *		<0.001 *		0.001 *		<0.001 *

Data are expressed as regression coefficients (β) and the respective p values; *—association is significant at p < 0.5.